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MPWR · Monolithic Power Systems, Inc. · Holdings

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Market Cap
$58.29B
Shares
49.14M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 1,251
Total Value: $66,911,340,016
Total Shares: 48,594,393
Showing 1–100 of 1,288 holdings by value · page 1 of 13

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 1,251 13F filers · Δ vs Mar 31, 2026
Top Holder
11.5%
Sep 2023 → Jun 2026 · range 11.4% – 13.0%
−1.4 pts
Top 5
38.7%
Sep 2023 → Jun 2026 · range 37.3% – 41.4%
−0.3 pts
Top 10
51.2%
Sep 2023 → Jun 2026 · range 49.7% – 52.5%
−0.2 pts
HHI
404
Sep 2023 → Jun 2026 · range 404 – 467
Broadly held−6

Quarterly Activity

vs Mar 31, 2026
New
217
Increased
423
Decreased
467
Sold Out
101
Unchanged
144
Holder count: +116
Institutional value: +30.7%
Shares held: +3.8%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 1,288
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 1280452 CUSIP 609839105 13F (30d) 380 filings 379 filers Visit website Investor relations